Yaskawa F7 Drive Programming Manual - Manual (Page 135)

Programming 127
L6 Torque Detection
L6-01 Torque Detection Selection 1
L6-02 Torque Detection Level 1
Setting Range: 0 to 300% of Drive rated output current
Factory Default: 150% of Drive rated output current
L6-03Torque Detection Time 1
Setting Range: 0.0 to 10.0 Seconds
Factory Default: 10.0 Seconds
The Drive can be programmed to indicate when either an overtorque or an undertorque conditions exist. A digital output must
be programmed for torque detection 1, (H2-0x = “B: Torque Detection 1 N.O.” or “17: Torque Detection 1 N.C.”). A warning
of an overtorque condition can indicate a jam and an undertorque condition can indicate a broken belt, no water in a pump, or
other loss of load.
To configure Torque Detection requires the following decisions:
1. Do you wish to check for an overtorque condition or an undertorque condition?
2. Do you wish to check for the torque condition whenever the drive is running or only at speed agree? Nuisance detection
during acceleration, when variable torques are normally required, can be avoided.
3. Do you want the drive to fault if the torque condition is detected or only alarm and continue operation?
The following table can help choose the proper setting for Torque Detection Selection 1 to get the wanted results.
Setting Description
0 Disabled (factory default)
1 OL3 at Speed Agree - Alarm
2 OL3 at Run - Alarm
3 OL3 at Speed Agree - Fault
4 OL3 at Run - Fault
5 UL3 at Speed Agree - Alarm
6 UL3 at Run - Alarm
7 UL3 at Speed Agree - Fault
8 UL3 at Run - Fault
Table 23 L6-01 Setting Choices
L6-01
Setting
Overtorque Undertorque Fault Alarm
Always
Detected
Only Detected @
Speed Agree
0 Torque Detection Disabled
1 X X X
2 X X X
3 X X X
4 X X X
5* X X X
6 X X X
7 X X
8 X X
*Suggested settings for Loss of Load indication